CVE Explorer
CVE-2026-52885
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.4, NppCommands.cpp checks the HMAC of the on-disk shortcuts.xml at the moment a user command fires (Time-of-Check). However, the command payload is taken from the in-memory _userCommands vector, which is populated at application startup and never re-synchronized with the on-disk file (Time-of-Use). Swapping shortcuts.xml between startup and command execution causes the HMAC check to validate a clean file while a malicious com
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"notepad-plus-plus","vendor":"notepad-plus-plus","versions":[{"status":"affected","version":"< 8.9.6.4"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":7.5,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5","tags":["x_refsource_MISC"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/4f7563c7c7f8ffa0d795ec86a7777067c7d644b5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/cna/references/1
{"name":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-qm4c-qg8p-qfcr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-qm4c-qg8p-qfcr"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-qm4c-qg8p-qfcr"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:471e6c5ac223400591ec43e8c90d3e4ff1bb84008b9c997bbbecd0e4ae65b3be · sha256:611d912d0ad574dc… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.